arch/powerpc/kernel/sys_ppc32.c

   1 /*
   2  * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
   3  *
   4  * Copyright (C) 2001 IBM
   5  * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   6  * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   7  *
   8  * These routines maintain argument size conversion between 32bit and 64bit
   9  * environment.
  10  *
  11  *      This program is free software; you can redistribute it and/or
  12  *      modify it under the terms of the GNU General Public License
  13  *      as published by the Free Software Foundation; either version
  14  *      2 of the License, or (at your option) any later version.
  15  */
  16
  17 #include <linux/kernel.h>
  18 #include <linux/sched.h>
  19 #include <linux/fs.h>
  20 #include <linux/mm.h>
  21 #include <linux/file.h>
  22 #include <linux/signal.h>
  23 #include <linux/resource.h>
  24 #include <linux/times.h>
  25 #include <linux/utsname.h>
  26 #include <linux/smp.h>
  27 #include <linux/smp_lock.h>
  28 #include <linux/sem.h>
  29 #include <linux/msg.h>
  30 #include <linux/shm.h>
  31 #include <linux/poll.h>
  32 #include <linux/personality.h>
  33 #include <linux/stat.h>
  34 #include <linux/mman.h>
  35 #include <linux/in.h>
  36 #include <linux/syscalls.h>
  37 #include <linux/unistd.h>
  38 #include <linux/sysctl.h>
  39 #include <linux/binfmts.h>
  40 #include <linux/security.h>
  41 #include <linux/compat.h>
  42 #include <linux/ptrace.h>
  43 #include <linux/elf.h>
  44
  45 #include <asm/ptrace.h>
  46 #include <asm/types.h>
  47 #include <asm/ipc.h>
  48 #include <asm/uaccess.h>
  49 #include <asm/unistd.h>
  50 #include <asm/semaphore.h>
  51 #include <asm/time.h>
  52 #include <asm/mmu_context.h>
  53 #include <asm/ppc-pci.h>
  54
  55 /* readdir & getdents */
  56 #define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
  57 #define ROUND_UP(x) (((x)+sizeof(u32)-1) & ~(sizeof(u32)-1))
  58
  59 struct old_linux_dirent32 {
  60         u32             d_ino;
  61         u32             d_offset;
  62         unsigned short  d_namlen;
  63         char            d_name[1];
  64 };
  65
  66 struct readdir_callback32 {
  67         struct old_linux_dirent32 __user * dirent;
  68         int count;
  69 };
  70
  71 static int fillonedir(void * __buf, const char * name, int namlen,
  72                                   off_t offset, ino_t ino, unsigned int d_type)
  73 {
  74         struct readdir_callback32 * buf = (struct readdir_callback32 *) __buf;
  75         struct old_linux_dirent32 __user * dirent;
  76
  77         if (buf->count)
  78                 return -EINVAL;
  79         buf->count++;
  80         dirent = buf->dirent;
  81         put_user(ino, &dirent->d_ino);
  82         put_user(offset, &dirent->d_offset);
  83         put_user(namlen, &dirent->d_namlen);
  84         copy_to_user(dirent->d_name, name, namlen);
  85         put_user(0, dirent->d_name + namlen);
  86         return 0;
  87 }
  88
  89 asmlinkage int old32_readdir(unsigned int fd, struct old_linux_dirent32 __user *dirent, unsigned int count)
  90 {
  91         int error = -EBADF;
  92         struct file * file;
  93         struct readdir_callback32 buf;
  94
  95         file = fget(fd);
  96         if (!file)
  97                 goto out;
  98
  99         buf.count = 0;
 100         buf.dirent = dirent;
 101
 102         error = vfs_readdir(file, (filldir_t)fillonedir, &buf);
 103         if (error < 0)
 104                 goto out_putf;
 105         error = buf.count;
 106
 107 out_putf:
 108         fput(file);
 109 out:
 110         return error;
 111 }
 112
 113 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
 114                 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
 115                 compat_uptr_t tvp_x)
 116 {
 117         /* sign extend n */
 118         return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
 119 }
 120
 121 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
 122 {
 123         long err;
 124
 125         if (stat->size > MAX_NON_LFS || !new_valid_dev(stat->dev) ||
 126             !new_valid_dev(stat->rdev))
 127                 return -EOVERFLOW;
 128
 129         err  = access_ok(VERIFY_WRITE, statbuf, sizeof(*statbuf)) ? 0 : -EFAULT;
 130         err |= __put_user(new_encode_dev(stat->dev), &statbuf->st_dev);
 131         err |= __put_user(stat->ino, &statbuf->st_ino);
 132         err |= __put_user(stat->mode, &statbuf->st_mode);
 133         err |= __put_user(stat->nlink, &statbuf->st_nlink);
 134         err |= __put_user(stat->uid, &statbuf->st_uid);
 135         err |= __put_user(stat->gid, &statbuf->st_gid);
 136         err |= __put_user(new_encode_dev(stat->rdev), &statbuf->st_rdev);
 137         err |= __put_user(stat->size, &statbuf->st_size);
 138         err |= __put_user(stat->atime.tv_sec, &statbuf->st_atime);
 139         err |= __put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
 140         err |= __put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
 141         err |= __put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
 142         err |= __put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
 143         err |= __put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
 144         err |= __put_user(stat->blksize, &statbuf->st_blksize);
 145         err |= __put_user(stat->blocks, &statbuf->st_blocks);
 146         err |= __put_user(0, &statbuf->__unused4[0]);
 147         err |= __put_user(0, &statbuf->__unused4[1]);
 148
 149         return err;
 150 }
 151
 152 /* Note: it is necessary to treat option as an unsigned int,
 153  * with the corresponding cast to a signed int to insure that the
 154  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 155  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 156  */
 157 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
 158 {
 159         return sys_sysfs((int)option, arg1, arg2);
 160 }
 161
 162 asmlinkage long compat_sys_pause(void)
 163 {
 164         current->state = TASK_INTERRUPTIBLE;
 165         schedule();
 166
 167         return -ERESTARTNOHAND;
 168 }
 169
 170 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
 171 {
 172         long usec;
 173
 174         if (!access_ok(VERIFY_READ, i, sizeof(*i)))
 175                 return -EFAULT;
 176         if (__get_user(o->tv_sec, &i->tv_sec))
 177                 return -EFAULT;
 178         if (__get_user(usec, &i->tv_usec))
 179                 return -EFAULT;
 180         o->tv_nsec = usec * 1000;
 181         return 0;
 182 }
 183
 184 static inline long put_tv32(struct compat_timeval __user *o, struct timeval *i)
 185 {
 186         return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
 187                 (__put_user(i->tv_sec, &o->tv_sec) |
 188                  __put_user(i->tv_usec, &o->tv_usec)));
 189 }
 190
 191 struct sysinfo32 {
 192         s32 uptime;
 193         u32 loads[3];
 194         u32 totalram;
 195         u32 freeram;
 196         u32 sharedram;
 197         u32 bufferram;
 198         u32 totalswap;
 199         u32 freeswap;
 200         unsigned short procs;
 201         unsigned short pad;
 202         u32 totalhigh;
 203         u32 freehigh;
 204         u32 mem_unit;
 205         char _f[20-2*sizeof(int)-sizeof(int)];
 206 };
 207
 208 asmlinkage long compat_sys_sysinfo(struct sysinfo32 __user *info)
 209 {
 210         struct sysinfo s;
 211         int ret, err;
 212         int bitcount=0;
 213         mm_segment_t old_fs = get_fs ();
 214
 215         /* The __user cast is valid due to set_fs() */
 216         set_fs (KERNEL_DS);
 217         ret = sys_sysinfo((struct sysinfo __user *)&s);
 218         set_fs (old_fs);
 219
 220         /* Check to see if any memory value is too large for 32-bit and
 221          * scale down if needed.
 222          */
 223         if ((s.totalram >> 32) || (s.totalswap >> 32)) {
 224             while (s.mem_unit < PAGE_SIZE) {
 225                 s.mem_unit <<= 1;
 226                 bitcount++;
 227             }
 228             s.totalram >>=bitcount;
 229             s.freeram >>= bitcount;
 230             s.sharedram >>= bitcount;
 231             s.bufferram >>= bitcount;
 232             s.totalswap >>= bitcount;
 233             s.freeswap >>= bitcount;
 234             s.totalhigh >>= bitcount;
 235             s.freehigh >>= bitcount;
 236         }
 237
 238         err = put_user (s.uptime, &info->uptime);
 239         err |= __put_user (s.loads[0], &info->loads[0]);
 240         err |= __put_user (s.loads[1], &info->loads[1]);
 241         err |= __put_user (s.loads[2], &info->loads[2]);
 242         err |= __put_user (s.totalram, &info->totalram);
 243         err |= __put_user (s.freeram, &info->freeram);
 244         err |= __put_user (s.sharedram, &info->sharedram);
 245         err |= __put_user (s.bufferram, &info->bufferram);
 246         err |= __put_user (s.totalswap, &info->totalswap);
 247         err |= __put_user (s.freeswap, &info->freeswap);
 248         err |= __put_user (s.procs, &info->procs);
 249         err |= __put_user (s.totalhigh, &info->totalhigh);
 250         err |= __put_user (s.freehigh, &info->freehigh);
 251         err |= __put_user (s.mem_unit, &info->mem_unit);
 252         if (err)
 253                 return -EFAULT;
 254
 255         return ret;
 256 }
 257
 258
 259
 260
 261 /* Translations due to time_t size differences.  Which affects all
 262    sorts of things, like timeval and itimerval.  */
 263 extern struct timezone sys_tz;
 264
 265 asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 266 {
 267         if (tv) {
 268                 struct timeval ktv;
 269                 do_gettimeofday(&ktv);
 270                 if (put_tv32(tv, &ktv))
 271                         return -EFAULT;
 272         }
 273         if (tz) {
 274                 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
 275                         return -EFAULT;
 276         }
 277
 278         return 0;
 279 }
 280
 281
 282
 283 asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
 284 {
 285         struct timespec kts;
 286         struct timezone ktz;
 287
 288         if (tv) {
 289                 if (get_ts32(&kts, tv))
 290                         return -EFAULT;
 291         }
 292         if (tz) {
 293                 if (copy_from_user(&ktz, tz, sizeof(ktz)))
 294                         return -EFAULT;
 295         }
 296
 297         return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
 298 }
 299
 300 #ifdef CONFIG_SYSVIPC
 301 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
 302                u32 fifth)
 303 {
 304         int version;
 305
 306         version = call >> 16; /* hack for backward compatibility */
 307         call &= 0xffff;
 308
 309         switch (call) {
 310
 311         case SEMTIMEDOP:
 312                 if (fifth)
 313                         /* sign extend semid */
 314                         return compat_sys_semtimedop((int)first,
 315                                                      compat_ptr(ptr), second,
 316                                                      compat_ptr(fifth));
 317                 /* else fall through for normal semop() */
 318         case SEMOP:
 319                 /* struct sembuf is the same on 32 and 64bit :)) */
 320                 /* sign extend semid */
 321                 return sys_semtimedop((int)first, compat_ptr(ptr), second,
 322                                       NULL);
 323         case SEMGET:
 324                 /* sign extend key, nsems */
 325                 return sys_semget((int)first, (int)second, third);
 326         case SEMCTL:
 327                 /* sign extend semid, semnum */
 328                 return compat_sys_semctl((int)first, (int)second, third,
 329                                          compat_ptr(ptr));
 330
 331         case MSGSND:
 332                 /* sign extend msqid */
 333                 return compat_sys_msgsnd((int)first, (int)second, third,
 334                                          compat_ptr(ptr));
 335         case MSGRCV:
 336                 /* sign extend msqid, msgtyp */
 337                 return compat_sys_msgrcv((int)first, second, (int)fifth,
 338                                          third, version, compat_ptr(ptr));
 339         case MSGGET:
 340                 /* sign extend key */
 341                 return sys_msgget((int)first, second);
 342         case MSGCTL:
 343                 /* sign extend msqid */
 344                 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
 345
 346         case SHMAT:
 347                 /* sign extend shmid */
 348                 return compat_sys_shmat((int)first, second, third, version,
 349                                         compat_ptr(ptr));
 350         case SHMDT:
 351                 return sys_shmdt(compat_ptr(ptr));
 352         case SHMGET:
 353                 /* sign extend key_t */
 354                 return sys_shmget((int)first, second, third);
 355         case SHMCTL:
 356                 /* sign extend shmid */
 357                 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
 358
 359         default:
 360                 return -ENOSYS;
 361         }
 362
 363         return -ENOSYS;
 364 }
 365 #endif
 366
 367 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
 368  * with the corresponding cast to a signed int to insure that the
 369  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 370  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 371  */
 372 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
 373 {
 374         mm_segment_t old_fs = get_fs();
 375         int ret;
 376         off_t of;
 377         off_t __user *up;
 378
 379         if (offset && get_user(of, offset))
 380                 return -EFAULT;
 381
 382         /* The __user pointer cast is valid because of the set_fs() */
 383         set_fs(KERNEL_DS);
 384         up = offset ? (off_t __user *) &of : NULL;
 385         ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
 386         set_fs(old_fs);
 387
 388         if (offset && put_user(of, offset))
 389                 return -EFAULT;
 390
 391         return ret;
 392 }
 393
 394 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
 395 {
 396         mm_segment_t old_fs = get_fs();
 397         int ret;
 398         loff_t lof;
 399         loff_t __user *up;
 400
 401         if (offset && get_user(lof, offset))
 402                 return -EFAULT;
 403
 404         /* The __user pointer cast is valid because of the set_fs() */
 405         set_fs(KERNEL_DS);
 406         up = offset ? (loff_t __user *) &lof : NULL;
 407         ret = sys_sendfile64(out_fd, in_fd, up, count);
 408         set_fs(old_fs);
 409
 410         if (offset && put_user(lof, offset))
 411                 return -EFAULT;
 412
 413         return ret;
 414 }
 415
 416 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
 417                   unsigned long a3, unsigned long a4, unsigned long a5,
 418                   struct pt_regs *regs)
 419 {
 420         int error;
 421         char * filename;
 422
 423         filename = getname((char __user *) a0);
 424         error = PTR_ERR(filename);
 425         if (IS_ERR(filename))
 426                 goto out;
 427         flush_fp_to_thread(current);
 428         flush_altivec_to_thread(current);
 429
 430         error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
 431
 432         if (error == 0) {
 433                 task_lock(current);
 434                 current->ptrace &= ~PT_DTRACE;
 435                 task_unlock(current);
 436         }
 437         putname(filename);
 438
 439 out:
 440         return error;
 441 }
 442
 443 /* Note: it is necessary to treat option as an unsigned int,
 444  * with the corresponding cast to a signed int to insure that the
 445  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 446  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 447  */
 448 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
 449 {
 450         return sys_prctl((int)option,
 451                          (unsigned long) arg2,
 452                          (unsigned long) arg3,
 453                          (unsigned long) arg4,
 454                          (unsigned long) arg5);
 455 }
 456
 457 /* Note: it is necessary to treat pid as an unsigned int,
 458  * with the corresponding cast to a signed int to insure that the
 459  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 460  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 461  */
 462 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
 463 {
 464         struct timespec t;
 465         int ret;
 466         mm_segment_t old_fs = get_fs ();
 467
 468         /* The __user pointer cast is valid because of the set_fs() */
 469         set_fs (KERNEL_DS);
 470         ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
 471         set_fs (old_fs);
 472         if (put_compat_timespec(&t, interval))
 473                 return -EFAULT;
 474         return ret;
 475 }
 476
 477 /* Note: it is necessary to treat mode as an unsigned int,
 478  * with the corresponding cast to a signed int to insure that the
 479  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 480  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 481  */
 482 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
 483 {
 484         return sys_access(filename, (int)mode);
 485 }
 486
 487
 488 /* Note: it is necessary to treat mode as an unsigned int,
 489  * with the corresponding cast to a signed int to insure that the
 490  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 491  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 492  */
 493 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
 494 {
 495         return sys_creat(pathname, (int)mode);
 496 }
 497
 498
 499 /* Note: it is necessary to treat pid and options as unsigned ints,
 500  * with the corresponding cast to a signed int to insure that the
 501  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 502  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 503  */
 504 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
 505 {
 506         return sys_waitpid((int)pid, stat_addr, (int)options);
 507 }
 508
 509
 510 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 511  * with the corresponding cast to a signed int to insure that the
 512  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 513  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 514  */
 515 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
 516 {
 517         return sys_getgroups((int)gidsetsize, grouplist);
 518 }
 519
 520
 521 /* Note: it is necessary to treat pid as an unsigned int,
 522  * with the corresponding cast to a signed int to insure that the
 523  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 524  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 525  */
 526 asmlinkage long compat_sys_getpgid(u32 pid)
 527 {
 528         return sys_getpgid((int)pid);
 529 }
 530
 531
 532
 533 /* Note: it is necessary to treat pid as an unsigned int,
 534  * with the corresponding cast to a signed int to insure that the
 535  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 536  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 537  */
 538 asmlinkage long compat_sys_getsid(u32 pid)
 539 {
 540         return sys_getsid((int)pid);
 541 }
 542
 543
 544 /* Note: it is necessary to treat pid and sig as unsigned ints,
 545  * with the corresponding cast to a signed int to insure that the
 546  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 547  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 548  */
 549 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
 550 {
 551         return sys_kill((int)pid, (int)sig);
 552 }
 553
 554
 555 /* Note: it is necessary to treat mode as an unsigned int,
 556  * with the corresponding cast to a signed int to insure that the
 557  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 558  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 559  */
 560 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
 561 {
 562         return sys_mkdir(pathname, (int)mode);
 563 }
 564
 565 long compat_sys_nice(u32 increment)
 566 {
 567         /* sign extend increment */
 568         return sys_nice((int)increment);
 569 }
 570
 571 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
 572 {
 573         /* sign extend n */
 574         return sys_lseek(fd, (int)offset, origin);
 575 }
 576
 577 /* Note: it is necessary to treat bufsiz as an unsigned int,
 578  * with the corresponding cast to a signed int to insure that the
 579  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 580  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 581  */
 582 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
 583 {
 584         return sys_readlink(path, buf, (int)bufsiz);
 585 }
 586
 587 /* Note: it is necessary to treat option as an unsigned int,
 588  * with the corresponding cast to a signed int to insure that the
 589  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 590  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 591  */
 592 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
 593 {
 594         return sys_sched_get_priority_max((int)policy);
 595 }
 596
 597
 598 /* Note: it is necessary to treat policy as an unsigned int,
 599  * with the corresponding cast to a signed int to insure that the
 600  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 601  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 602  */
 603 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
 604 {
 605         return sys_sched_get_priority_min((int)policy);
 606 }
 607
 608
 609 /* Note: it is necessary to treat pid as an unsigned int,
 610  * with the corresponding cast to a signed int to insure that the
 611  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 612  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 613  */
 614 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
 615 {
 616         return sys_sched_getparam((int)pid, param);
 617 }
 618
 619
 620 /* Note: it is necessary to treat pid as an unsigned int,
 621  * with the corresponding cast to a signed int to insure that the
 622  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 623  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 624  */
 625 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
 626 {
 627         return sys_sched_getscheduler((int)pid);
 628 }
 629
 630
 631 /* Note: it is necessary to treat pid as an unsigned int,
 632  * with the corresponding cast to a signed int to insure that the
 633  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 634  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 635  */
 636 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
 637 {
 638         return sys_sched_setparam((int)pid, param);
 639 }
 640
 641
 642 /* Note: it is necessary to treat pid and policy as unsigned ints,
 643  * with the corresponding cast to a signed int to insure that the
 644  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 645  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 646  */
 647 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
 648 {
 649         return sys_sched_setscheduler((int)pid, (int)policy, param);
 650 }
 651
 652
 653 /* Note: it is necessary to treat len as an unsigned int,
 654  * with the corresponding cast to a signed int to insure that the
 655  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 656  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 657  */
 658 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
 659 {
 660         return sys_setdomainname(name, (int)len);
 661 }
 662
 663
 664 /* Note: it is necessary to treat gidsetsize as an unsigned int,
 665  * with the corresponding cast to a signed int to insure that the
 666  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 667  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 668  */
 669 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
 670 {
 671         return sys_setgroups((int)gidsetsize, grouplist);
 672 }
 673
 674
 675 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
 676 {
 677         /* sign extend len */
 678         return sys_sethostname(name, (int)len);
 679 }
 680
 681
 682 /* Note: it is necessary to treat pid and pgid as unsigned ints,
 683  * with the corresponding cast to a signed int to insure that the
 684  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 685  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 686  */
 687 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
 688 {
 689         return sys_setpgid((int)pid, (int)pgid);
 690 }
 691
 692 long compat_sys_getpriority(u32 which, u32 who)
 693 {
 694         /* sign extend which and who */
 695         return sys_getpriority((int)which, (int)who);
 696 }
 697
 698 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
 699 {
 700         /* sign extend which, who and niceval */
 701         return sys_setpriority((int)which, (int)who, (int)niceval);
 702 }
 703
 704 long compat_sys_ioprio_get(u32 which, u32 who)
 705 {
 706         /* sign extend which and who */
 707         return sys_ioprio_get((int)which, (int)who);
 708 }
 709
 710 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
 711 {
 712         /* sign extend which, who and ioprio */
 713         return sys_ioprio_set((int)which, (int)who, (int)ioprio);
 714 }
 715
 716 /* Note: it is necessary to treat newmask as an unsigned int,
 717  * with the corresponding cast to a signed int to insure that the
 718  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 719  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 720  */
 721 asmlinkage long compat_sys_ssetmask(u32 newmask)
 722 {
 723         return sys_ssetmask((int) newmask);
 724 }
 725
 726 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
 727 {
 728         /* sign extend len */
 729         return sys_syslog(type, buf, (int)len);
 730 }
 731
 732
 733 /* Note: it is necessary to treat mask as an unsigned int,
 734  * with the corresponding cast to a signed int to insure that the
 735  * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
 736  * and the register representation of a signed int (msr in 64-bit mode) is performed.
 737  */
 738 asmlinkage long compat_sys_umask(u32 mask)
 739 {
 740         return sys_umask((int)mask);
 741 }
 742
 743 #ifdef CONFIG_SYSCTL
 744 struct __sysctl_args32 {
 745         u32 name;
 746         int nlen;
 747         u32 oldval;
 748         u32 oldlenp;
 749         u32 newval;
 750         u32 newlen;
 751         u32 __unused[4];
 752 };
 753
 754 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
 755 {
 756         struct __sysctl_args32 tmp;
 757         int error;
 758         size_t oldlen;
 759         size_t __user *oldlenp = NULL;
 760         unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
 761
 762         if (copy_from_user(&tmp, args, sizeof(tmp)))
 763                 return -EFAULT;
 764
 765         if (tmp.oldval && tmp.oldlenp) {
 766                 /* Duh, this is ugly and might not work if sysctl_args
 767                    is in read-only memory, but do_sysctl does indirectly
 768                    a lot of uaccess in both directions and we'd have to
 769                    basically copy the whole sysctl.c here, and
 770                    glibc's __sysctl uses rw memory for the structure
 771                    anyway.  */
 772                 oldlenp = (size_t __user *)addr;
 773                 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
 774                     put_user(oldlen, oldlenp))
 775                         return -EFAULT;
 776         }
 777
 778         lock_kernel();
 779         error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
 780                           compat_ptr(tmp.oldval), oldlenp,
 781                           compat_ptr(tmp.newval), tmp.newlen);
 782         unlock_kernel();
 783         if (oldlenp) {
 784                 if (!error) {
 785                         if (get_user(oldlen, oldlenp) ||
 786                             put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
 787                                 error = -EFAULT;
 788                 }
 789                 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
 790         }
 791         return error;
 792 }
 793 #endif
 794
 795 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
 796                           unsigned long prot, unsigned long flags,
 797                           unsigned long fd, unsigned long pgoff)
 798 {
 799         /* This should remain 12 even if PAGE_SIZE changes */
 800         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
 801 }
 802
 803 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
 804 {
 805         /* sign extend tgid, pid */
 806         return sys_tgkill((int)tgid, (int)pid, sig);
 807 }
 808
 809 /*
 810  * long long munging:
 811  * The 32 bit ABI passes long longs in an odd even register pair.
 812  */
 813
 814 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
 815                              u32 reg6, u32 poshi, u32 poslo)
 816 {
 817         return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 818 }
 819
 820 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
 821                               u32 reg6, u32 poshi, u32 poslo)
 822 {
 823         return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
 824 }
 825
 826 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
 827 {
 828         return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
 829 }
 830
 831 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
 832                                 unsigned long high, unsigned long low)
 833 {
 834         return sys_truncate(path, (high << 32) | low);
 835 }
 836
 837 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
 838                                  unsigned long low)
 839 {
 840         return sys_ftruncate(fd, (high << 32) | low);
 841 }
 842
 843 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
 844                           size_t len)
 845 {
 846         return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
 847                                   buf, len);
 848 }
 849
 850 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 851                      size_t len, int advice)
 852 {
 853         return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
 854                              advice);
 855 }
 856
 857 asmlinkage long compat_sys_add_key(const char __user *_type,
 858                               const char __user *_description,
 859                               const void __user *_payload,
 860                               u32 plen,
 861                               u32 ringid)
 862 {
 863         return sys_add_key(_type, _description, _payload, plen, ringid);
 864 }
 865
 866 asmlinkage long compat_sys_request_key(const char __user *_type,
 867                                   const char __user *_description,
 868                                   const char __user *_callout_info,
 869                                   u32 destringid)
 870 {
 871         return sys_request_key(_type, _description, _callout_info, destringid);
 872 }
 873